鼠標滾軸控制文本框值的JS代碼

2019-11-20 21:39:10

字體：大中小

來源：轉載

供稿：網友

<html>
<head>
<title></title>
<script type="text/javascript" language="javascript">

    /*根據獲得焦點的時候給setVal給值*/
    var setVal;
    var bool = false;
    var scrollFunc=function(e){
        var direct=0;
        e=e || window.event;
        var ew = e.wheelDelta
        if(ew && bool){
            if(ew > 0){
                var num1 = setVal.value;
                if(num1 > 0){
                    num1 = eval(1+parseInt(num1));
                }else{
                    num1 = 1;
                }
            }else{
                var num1 = setVal.value;
                if(num1 > 0){
                    num1 = eval(parseInt(num1)-1);
                }else if(num1 == 0){
                    num1 = 0;
                }else{
                    num1 = 1;
                }
            }

            setVal.value = num1;
        }

    }
    window.onmousewheel=document.onmousewheel=scrollFunc;

    function ufocus(eve){
        bool = true;
        setVal = eve;
    }

    function ublur(){
        bool = false;
        setVal = null;
    }
</script>
</head>

<body>
<input type="text" onfocus="ufocus(this)" onblur="ublur(this)"/>
</body>

</html>

<html>

<head>

<title></title>
<script type="text/javascript" language="javascript">

    /*根據獲得焦點的時候給setVal給值*/
    var setVal;
    var bool = false;
    var scrollFunc=function(e){
        var direct=0;
        e=e || window.event;
        var ew = e.wheelDelta
        if(ew && bool){
            if(ew > 0){
                var num1 = setVal.value;
                if(num1 > 0){
                    num1 = eval(1+parseInt(num1));
                }else{
                    num1 = 1;
                }
            }else{
                var num1 = setVal.value;
                if(num1 > 0){
                    num1 = eval(parseInt(num1)-1);
                }else if(num1 == 0){
                    num1 = 0;
                }else{
                    num1 = 1;
                }
            }

            setVal.value = num1;
        }

    }

    window.onmousewheel=document.onmousewheel=scrollFunc;

    function ufocus(eve){
        bool = true;
        setVal = eve;
    }

    function ublur(){
        bool = false;
        setVal = null;
    }
</script>
</head>

</html>

上一篇：js 自動播放的實例代碼

下一篇：jquery交替變換顏色的三種方法實例代碼